US3592095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shears and the like apparatus for cutting sheet material
Assignee: B R G RUE PASTEUR DEVIL SOC
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Filing: 1969-04-09
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Granted: 1971-07-13
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Expires: 1989-04-09
Abstract
Abstract The shears are of the type including a centering carriage adapted to cut circular blanks out of a metal sheet, said carriage being slidingly fitted and held between two guiding rails in any desired longitudinal position and being provided with a rotary plate or the like means over which the metal sheet may rest to be shifted angularly by predetermined amounts to allow a succession of cuts to be executed along the desired circular line of cut, a jack associated with the jacks controlling the shearing blades providing in antagonism with a spring for the intermittent progression of the rotary plate through the agency of a ratchet wheel.
Inventors
- 👤 Rene Passa
- 👤 Achille Romoli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:00
CPC Classifications
B; B21; B21D; B21D43/00; B21D43/28; B21D43/287; B23; B23D; B23D33/00; B23D33/02; B23D33/04; Y; Y10; Y10T; Y10T83/00; Y10T83/444; Y10T83/4607; Y10T83/647; Y10T83/654; Y10T83/6545; Y10T83/748
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
111 words
In a shears for cutting circular blanks out of sheet material, a combination comprising elongated guide means; a centering carriage carried by said guide means movable in longitudinal direction thereof; means for securing said centering carriage in any desired position along said guide means; removable means carried by said carriage turnable about an axis; means cooperating with said revolvable means for holding a sheet to be cut thereon for turning movement therewith about said axis; drive means for angularly turning said revolvable means about said axis through increments in sequence with the movement of the shear blades and adjusting means cooperating with said drive means for adjusting said increments of turning.
Claim 2
Dependent Claim
111 words
In a shears for cutting circular blanks out of sheet material, a combination comprising elongated guide means; a centering carriage carried by said guide means movable in longitudinal direction thereof; means for securing said centering carriage in any desired position along said guide means; removable means carried by said carriage turnable about an axis; means cooperating with said revolvable means for holding a sheet to be cut thereon for turning movement therewith about said axis; drive means for angularly turning said revolvable means about said axis through increments in sequence with the movement of the shear blades and adjusting means cooperating with said drive means for adjusting said increments of turning.
Claim 3
Dependent Claim
88 words
A combination as defined in claim 1, wherein said revolvable means comprise a plate carried by said carriage turnable about said axis, and wherein said drive means comprise free wheel means coaxial with said plate, a single-acting hydraulic jack connected to said free wheel means for turning the same in one direction, and a spring stressed by said jack when operative and to return said jack and free wheel means into their starting position to cause said free wheel means to shift said rotary plate by one step.
Claim 4
Dependent Claim
23 words
A combination as defined in claim 2, and including adjustable stop means for limiting turning of said free wheel means by said spring.
Claim 5
Dependent Claim
31 words
A combination as defined in claim 2, wherein said free wheel means comprises a driving plate having two radial projections, and means tiltably connecting one of said projections with said jack.
Claim 6
Dependent Claim
63 words
A combination as defined in claim 4, and including a stud projecting from the other of said projections, a cylindrical stop provided with a transverse slope extending into the path of movement of said stud, and manually operable means controlling the angular position of said cylindrical stop to thereby adjust the angular movement of said driving plate under the influence of said spring.
Claim 7
Dependent Claim
61 words
A combination as defined in claim 1, wherein said revolvable means comprises a plate carried by said carriage turnably about said axis, and wherein said means for holding the sheet comprises a raised rubber edge on said plate adapted to carry the sheet to be cut, and means for exerting a suction action beneath the sheet resting on said rubber edge.
Claim 8
Dependent Claim
66 words
A combination as defined in claim 6, wherein said means for exerting said suction action comprise a vacuum pump including a cylinder carried by said carriage, a piston in said cylinder, a piston rod rigid with said piston and having a handle portion projecting beyond said carriage, and conduit means connecting the interior of said cylinder with a portion of said plate within said rubber edge.
Claim 9
Dependent Claim
19 words
A combination as defined in claim 7, and including means for locking said piston rod in its drawnout position.
Claim 10
Dependent Claim
34 words
A combination as defined in claim 7, and including a one-way valve between said vacuum pump and said plate and a cock adapted to provide connection between said conduit means and the outer atmosphere.
References Cited (Backward Citations)
US2956464A
Cited
US3267788A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |